MediaWiki core's PHP unit and integration tests are in the
When adding new tests, unit tests should be placed in
tests/phpunit/unit and integration tests should be placed in
The directory structure roughly matches that of the code being tested.
For example: you can find the unit tests for file
Extensions should have PHPUnit tests in a
tests/phpunit subdirectory, using subdirectories to separate unit and integration tests, e.g.
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